This area of research considered a zero dimensional approach to study mass transport in fresh-water environments. Such models are used to understand relation between processes that affect the mass transfer of species. The results can be later incorporate in more sophisticated models (e.g. 2D or 3D species transport).

Nitrification model.

Figure 1 shows the main processes that influence nitrification and

Unsteady species concentration.

Figure 2 shows the solution of the ODE’s for an unsteady flow. (concentrations in mg/L and time in days)